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Reports a problem when instance attribute
definition is outside <code>__init__</code> method.
<p><b>Example:</b></p>
<pre><code>
    class Book:
    def __init__(self):
        self.author = 'Mark Twain'

    def release(self):
        self.year = '1889'
</code></pre>
<p>
  When the quick-fix is applied, the code sample changes to:
</p>
<pre><code>
    class Book:
    def __init__(self):
        self.year = '1889'
        self.author = 'Mark Twain'

    def release(self):
        pass
</code></pre>
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